Remove -1 from thumbnail dimensions
Merge pull request #159 from chmac/master

Question: Why -1 on thumbnail dimensions?
Fix method signature for CakePHP 2.4.1 to fix E_STRICT warnings

See: http://bakery.cakephp.org/articles/markstory/2013/09/15/cakephp_2_4_1_released
Merge pull request #160 from Cruel/master

Fix method signature for CakePHP 2.4.1 to fix E_STRICT warnings
add doco for installing with composer

Signed-off-by: Joshua Paling <joshua.paling@gmail.com>